The percent concentration of a chemical in a substance shall be measured on the basis of volume or total weight, which measurement yields the lesser percent.
22 U.S. Code § 6742 - Prohibition relating to low concentrations of Schedules 2 and 3 chemicals
This chapter, referred to in subsec. (a), was in the original “this Act” and was translated as reading “this division”, meaning div. I of Pub. L. 105–277, Oct. 21, 1998, 112 Stat. 2681–856, known as the Chemical Weapons Convention Implementation Act of 1998, to reflect the probable intent of Congress. For complete classification of division I to the Code, see Short Title note set out under section 6701 of this title and Tables.